Artificial tooth.



L. PERZIN.

ARTIFICIAL TOOTH.

APPLICATION FILED 001.10, 1912.

1,071,952. Patented Sept. 2, 1913.

FIG I C 1/ INVENTOR WITNESSES r 41/ j-emh 0. 1 a .1 F1 Y 7 "9 x\ A TTORNE Y lUWlThim @TdTl "iweillhll l' l ti LEO remain, on :rmnannnrnim, riamvartvanm.

AETIEICIAL TOOTH.

specification Letters Patent. Patented Bept. $13, 1913- il,i)t3l,952.

application filed October 19, 1912. Serial Ito. 726,688.

inserts of baser metal for the ends of these To all whom it may concern:

tubular pins. \Vithin the tooth body 1, I 55 Be it known that I, LEO Pnnzm, a subject of the Czar of Russia, and a resident of Philadelphia, Pennsylvania, have invented certain new and useful Improvements in Artificial Teeth, of which the following is a specification.

The purpose of my invention is to protect the hollow pins in porcelain teeth from filling with wax during the process of carding for exhibit and sale and to enable these tubular attaching means or pins to be forced through gold backings secured to the inner surface of the porcelain.

lfipmre l. is a perspective view, showing a number of teeth carded for sale. Fig. 2 is a loiugltudinal section of atooth with a pin in place. Fig. 3 is an elevation partly in section of a card having a tooth mounted thereon. Figs. -il-6 are longitudinal cross sectional views illustrating my invention.

In the construction of artificial tooth facinge, it has been found advantageous to attach these facings or teeth to a gold backing material by pins having tubular ends projectin beyond the surface of the porcelain that these tubular projecting ends .may be passed through the backing and turned outwardly and rearwardly, as in the case of eyelet setting, and thus retain the backing rigidly against the facing. These tubular pins must stand the baking heat of porcelain and are commonly made of platinum, consequently very expensive. In order to prevent intrusion of the wax within the tubular end of the pins when carded as seen in Fig. 1 and at the same time facilitate the insertion of the-pins through metal backings, such as are shown in Pigs. 4 and 6, I have provided a pointed plug which I temporarily insert within the tubular pin. I prefer to use apin which is tubular throughout its length, because it is cheaper and gives a longer bearing for the pointed plug and'because I am enabled readily to swell it at the end Within the porcelain for anehorage purposes.

I have accom lished the double purpose of preventing t e vax of the card mount from being forced into the tubular )ins and of preparing the pins for making t eir own holes within the backing without preliminary measurements by providing pointed have placed a tube 2 of infusible material preferably platinum, which I have belled or flared at the end, as at 3, in order that it may be thoroughly anchored therein, leaving the entire interior of the in open, as at '60 4, and of substantially uni orm diameter throughout the outer portion thereof, for the double purpose of saving platinum and providing for rigid side support of my plug This plug prevents the wax or other material of the card mount 7 from bein I forced within the opening 4 of the pins. The plugs may be removed for subsequent finish of the pins by bending or turning at 8, as in Fig. (3,

or may be soldered tightly therein if desired. This latter stiii'ens thepin with a much less expensive metal than the platinum and permits the use of the projecting plug with shorter tubular plns, than would otherwise be required, since the tubular 7a platinum need then not extend beyond the porcelain.

In order to facilitate the placing of the facings upon the backings (5, without the necessity for preliminary measurement,l. point the plugs 5, as at 0,,so that they will pierce the backing and guide the tubular pins through the openings thus formed.

The platinum pin, while not as soft as the preferably gold backing (i, is much softerthan the baser metal, which I prefer to use for the plugs 5 but, supported by such plugs, these tubular pins will readily enlarge the opening, which has been started by the plugs and pass through the back to the position 91) shown in Fig. 4. This figure illustrates my preferred construction where the tubular pm 2 1s extended to pass through the backing and to be turned over, as in Fig. 6.

llttVlIl r thus descrlbed m invention what 95 I claim as new and desire to secure by lotters Patent is:

In a device of the character stated, a tooth body, a tubular pin therein, projecting beyond the surface of the tooth and a pointed temporary plug for said pin, having its point projecting beyond the pin.

LEO PERZTN. Witnesses:

Tnos. D. Mownns, HELEN I. KAUFFMAN. 

